var ll:MutableList<String> = mutableListOf("B","KB","MB","GB","TB")
fun a(num:Int, s:String, i:Int):String{
    if(num>=1024){
        var num1=num/1024
        var s1=s+"${num%1024}${ll[i]}"
        var b=i+1
        return a(num1,s1,b)
    }
    return "$s$num${ll[i]}"
}
fun main(){
    println(a(56464664,"",0))
}